Table 2
MCMC analysis on simulated data.
| Option (param): data | ηT | K0 × 102 | δ | Vc | Va | α | ηS |  d.o.f. |
| – | (kpc2 Myr-1) | – | (km s-1) | (km s-1) | – | – | – | |
|
|
||||||||
| Model II | ||||||||
| 1 | 10.0 | 0.2 | (...) | 70 | 2.3 | 1 | (...) | |
| 1: 3He/4He+He10% | [1] |
|
|
(...) |
|
|
|
0.93 |
| 2: 3He/4He+He1% | [1] |
|
|
(...) |
|
|
|
1.08 |
| 2’: 2 + src = true | [1] |
|
|
(...) |
|
[2.3] | [1] | 0.97 |
| 3: 3He/4He | [1] |
|
|
(...) |
|
|
|
0.87 |
| 3’: 3 + src = true | [1] |
|
|
(...) |
|
[2.3] | [1] | 0.88 |
| 4: 3He/4He + src = prior | [1] |
|
|
(...) |
|
[1.8,2.5] | [−2, +2] | 1.08 |
|
|
||||||||
| Model III | ||||||||
| 1.5 | 0.75 | 0.7 | 18 | 41 | 2.3 | 1 | (...) | |
| 1: 3He/4He+He10% |
|
|
|
|
|
|
|
1.43 |
| 2: 3He/4He+He1% |
|
|
|
|
|
|
|
1.00 |
| 2’: 2 + src = true |
|
|
|
|
|
[2.3] | [1] | 1.01 |
| 3: 3He/4He |
|
|
|
|
|
|
|
0.83 |
| 3’: 3 + src = true |
|
|
|
|
|
[2.3] | [1] | 0.89 |
| 4: 3He/4He + src = prior |
|
|
|
|
|
[1.8,2.5] | [−2, +2] | 0.96 |
|
|
||||||||
| Model III: analysis with Model II | ||||||||
| 1.5 | 0.75 | 0.7 | 18 | 41 | 2.3 | 1 | (...) | |
| 1: 3He/4He+He10% | [1] |
|
|
(...) |
|
|
|
4.0 |
| 2: 3He/4He+He1% | [1] |
|
|
(...) |
|
|
|
18 |
| 4: 3He/4He + src = prior | [1] |
|
|
(...) |
|
[1.8,2.5] | [−2, +2] | 2.1 |
|
|
||||||||
| Model II: analysis with Model III | ||||||||
| 1 | 10.0 | 0.2 | 0 | 70 | 2.3 | 1 | (...) | |
| 1: 3He/4He+He10% |
|
|
|
|
|
|
|
0.97 |
| 2: 3He/4He+He1% |
|
|
|
|
|
|
|
1.1 |
| 4: 3He/4He + src=prior |
|
|
|
|
|
[1.8,2.5] | [−2, +2] | 1.05 |
Notes. For each model considered (II or III), the first line (in italic) gives the value of the transport parameters used to generate the artifical data (the halo size is set to L = 4 kpc). Each subsequent line corresponds to the MCMC-reconstructed values (most probable value, and relative uncertainties corresponding to the 68% CI) based on a given parameters/data option (see Sect. 3.2). The last column gives the value of the best χ2/d.o.f. configuration found (corresponding to the curves shown in Fig. 1). A value in square brackets corresponds to the fixed value of the parameter for the analysis. An interval in square brackets corresponds to the prior used for the analysis (the posterior PDF obtained is then close to the prior).
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